The Si4491EDY from Vishay is a MOSFET with Continous Drain Current -25.8 A, Drain Source Resistance 5 to 11.2 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -25 to 25 V, Gate Source Threshold Voltage -1.2 to -2.8 V. Tags: Surface Mount. More details for Si4491EDY can be seen below.